摘要
采用“含有配制油基钻井液用主乳和油相的Winsor I微乳液+臭氧氧化”联合工艺对油基岩屑进行处理,Winsor I微乳液处理油基岩屑后所得的基础油和部分主乳化剂进入平衡油相,可以用来配制油基钻井液,臭氧氧化对岩屑进行深度处理,进一步降低岩屑表面含油量。文章以处理后岩屑含油量为指标,系统优化了微乳液组成、微乳液清洗油基岩屑工艺和臭氧氧化工艺。根据实验结果推荐微乳液组成为“脂肪醇聚氧乙烯醚硫酸钠+配制油基钻井液用主乳化剂(21)”,混合乳化剂浓度为6%,正戊醇浓度5%,柴油浓度36%,其他为盐水。微乳液清洗条件为固液比15,室温下搅拌清洗60 min。此条件下岩屑含油量可降至1.41%,微乳液重复使用4次后,岩屑含油量仍可以保持在2.0%以下。臭氧氧化深度处理时,推荐工艺条件为臭氧氧化时间40 min,清水pH=7,固液比15,臭氧流量5 mg/min,处理后岩屑含油量可降至0.36%。
This study discussed the treatment of oil-based drilling cuttings using a combined process of Winsor I microemulsion containing main emulsion and oil phase used in formulating oil-based drilling fluids and ozone oxidation.The base oil and the main emulsifiers obtained from the treatment of oil-based drilling cuttings using Winsor I microemulsion enter the equilibrium oil phase and can be used in formulating oil-based drilling fluids.Ozone oxidation was used to further reduce the oil content on the surface of the cuttings.The microemulsion composition,cleaning process of oil-based drilling cuttings using microemulsion,and ozone oxidation process were systematically optimized based on the oil content of the treated cuttings.The recommended microemulsion composition was“sodium dodecyl sulfate(SDS)+main emulsifier for formulating oil-based drilling fluids(21)”,with a concentration of mixed emulsifier at 6%,n-pentanol concentration at 5%,diesel concentration at 36%,and the remaining as saltwater.The cleaning conditions of the microemulsion was stirring for 60 minutes at solid-liquid ratio of 15 and room temperature.Under these conditions,the oil content of the cuttings could be reduced to 1.41%,and the microemulsion could be reused up to 4 times while maintaining the oil content of the cuttings no more than 2.0%.For the deep treatment,the recommended process conditions were ozone oxidation time of 40 minutes and flow rate of 5 mg/min,at pH of 7 and solid-liquid ratio of 15.The oil content of the treated cuttings could be reduced to 0.36%.
作者
张鼎
唐培林
黎亮
周素林
张琳婧
张益臣
宋英发
方申文
Zhang Ding;Tang Peilin;Li Liang;Zhou Sulin;Zhang Linjing;Zhang Yichen;Song Yingfa;Fang Shenwen(College of Chemistry and Chemical Engineering,Southwest Petroleum University;Natural Gas Exploration and Development Division of Zhejiang Oilfield Company;Environmental Protection Technology Service Company of Sinopec Jianghan Petroleum Engineering Company;Quality,Health,Safety and Environmental Protection Department of Zhejiang Oilfield Company;Southwest Gas Production Plant of Zhejiang Oilfield Company)
出处
《油气田环境保护》
CAS
2023年第3期27-32,共6页
Environmental Protection of Oil & Gas Fields
基金
中国石油-西南石油大学创新联合体科技合作项目(2020CX020000)。
关键词
油基岩屑
微乳液
臭氧氧化
oil-based cuttings
microemulsion
ozone oxidation
